| 摘要 |
A lathe-cutting apparatus and a method with a structure of a chuck being simple, which are capable of lathe-cutting an eccentric part of a crankshaft with high accuracy are provided. For this purpose, the apparatus includes a supporting device ( 21 ) for supporting both end portions of a crankshaft ( 1 ), a rotational drive device ( 20 ) for rotating the crankshaft from at least one end side of the supporting device with a main journal ( 3 ) of the crankshaft as a center, and rotationally driving an eccentric part ( 2 ), a tool ( 31 ) for performing lathe-cutting of the eccentric part, and a cutting tool drive unit ( 30 ) for making a cutting edge position of the tool perform crank rotation synchronously with the rotation of the eccentric part which is rotationally driven by the rotational drive device, and performing lathe-cutting of the eccentric part.
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